Retarded switch



H. W. CHENEYL` RETARDED SWITCH. APPucAnoN man was. 19:8.

UNITED STATES Pariezlir ori-fics. i,

HERBERT W. CHENEY, 0F IM'.IL'WAUKEE, WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS MAIWTFACTRING COMPANY, 0F MILWAUKEE, WISCONSIN, A CORPORATION OF lDEoZ. WARE.

RETARDED SWIT CH.

specification of Letters rarem- Patented J une 22, i920.

Application filed August 5, 1918; Serial No. 249,578.

mentioned it is desirable that the circuit be broken or closed with considerable rapidity .",f'alve mechanism of the das in order that the contact surfaces may not become roughened tooA greatly by arcing.

It is furthermore desirable that new surfaces be presented at the point of contact so that the arcing will not always take place at the same point.

One of the objects of the invention is to provide a contact mechanisrn-y in which a quick break is secured. Another' object 1s to provide a contact mechanism in which the contacts are kept clean and new surfaces are periodically exposed. Still another object is to provide a combined wiping and rolling contact action. n

In such retarded contact mechanisms as referred to above it is desirable that both the magnetic member of the relay and the retarding device be simply and conveniently `adjustable and it is an object of this invention to provide a construction embodying these features.

Other objects will appear hereinafter as the description of the invention proceeds.

The various novel features oi the invention will appear from this' speciiiration and the accompanying drawings which torni a part thereof and disclose one embodiment ot the invention, and all these nove .tentures are intended to be particularly pointed out in the claims.

In the drawings, Figure l is an'elevation of a retarded relay partly in section, embodying the various features of the invention.

Fig. 2 is an enlarged. detai.l view oi the pot, partly broken away, ot' the relay.

members.

Fig. 3' isha section on the line IILLHI of Fig. 2 looking in the direction'ot the arrows. Fig. 4 is a fragmentary View showing a dili'erent relative position of the contact In Fig. 1 is shown a coil l provided for actuating the corer^2 which is arranged to be drawn 'up within the coil when the latter is suliciently energized. The coreA 2 is threaded on an actuating rod 3 whichy rod has an insulating spool 4 fastened in any suitable manner as by the pin 5 to the top end of said rod. The spool 4 is adapted to enragev the cont-actor lever 6 in both directions ot the .movement and the contacter lever is provided with a notch or slot in the side thereof whereby the spool and the lever may be brought into coperative relation.

The contacter lever 6 is pivoted at 7 in a double-armed bracket 8 Jfastened in any suit able manner to the insuating base 9. The contactor lever is provided with an arm 10 and a spring 11 acts upon this arm through a pin l2, the said spring, at its other end, being loopedaround a pin 13 inthe bracket 8. The contacter lever is provided with a contact portion 14, here shown as of arcuate form. This Contact is adapted to engage a roller-contact forming the relatively sta- "ionary contact of the contact mechanism. This rollei''contact may be "made ot carbon or any other suitable material. The rollercontact is here shown as provided with a bushing` i6 having a hole considerably larger than the positioning pin 17, mounted in the bracket 18. A spring 2() is provided for biasing the roller-contact toward the contact li. A portion ot the roller-contact and the Vbracket have been broken away in Fig. 4 to show clearly that the part 1G has a hole through which the pin l2 passes.

The coil l is lined with a tube 2l preterably of non-magnetic material, which tube is here shown as exteiuling;r downwardly to forni a support tor the dash pot n'iecbanisni ot' which 23 is the lid oi the dash pot 24.. The dash pot is provided with a piston 25 slidable on a collar 26 on the piston rod 27. The piston is provided with any suitable number of holes 28 which, in the upstroke of the mechanism as it is here embodied, closed by means ot' the closure vplate 29. The plate 29 is fastened in any suitable met Her-cm1 1a; upm". mpi

inw.

lhv mili Il il' Wick l' desired to limit the invention claimed to the ist exact details of construction herein shown and descrilied, for obvious modifications ,ma occur to persons skilled in the art.

t is claimed and desired to secure by Let- 'ters Patent:

1. In combination, relatively movable coacting contacts, one of which is rotatable, supports for said. contacts, and means in-- cluding a lost motion connection between the rotatable contact and its support Whereby when the contacts are moved relatively to each other the rotatable contact 'will be rotated.

Q. In combination, relatively movable coacting contacts, a support .for one of said contacts having a, lost motion connection therewith, means for biasing said contacts toward each other, said first mentioned contact being movable in a direction substantially tangential to said secondnamed contact.

3. 4ln combination, a movable contact, a relatively stationary contact for coacting therewtlna support for said relatively stationaryl contact having a lost motion vconnection therewith, means for biasing said relatively stationary contact toward said movable Contact, said movable contact being movable in a direction substantially tangential to Said relativelyT stationary contact.

4. In combination, a pivotally mounted movable contact of arcuate forni; a relatively stationary contact of substantially Icyliiidrical -fornrt'or coacting with said arcuate contact, an -axial hole in said cylindrical contact, a positioning-pin smaller than said hole and passing therethrough, and resilient means for biasing said cyl-in.- lrical contact toward said arcuate contact.

5. In combination, a movable contact, a relatively stationary rotatable contact coacting therewith and means whereby when the movable, contact is moved to one position the relatively. stationary contact is rotated in one direction and when the movable con-V tact is moved to another position the relatively stationary contact is rotated a greater amount in the opposite direction, whereby combined wiping and roller contact is ,se--

cured.

6. In combination with a Winding, a plunger for said winding, a tube Wlthin whici said plunger is adapted to reciprocate, a retarding device attached to one end of said tube, an actuatin rod' for said retarding device extending 'into said tube, ad justing means for said retardin .device also disposed in said tube, said tu e having a portion of its Walls cut away whereby the plunger and adjusting means may be manipulated. l

7. In combination, a winding,- a movable magnetic'member therefor, a movable contactor, a loosely mounted rollercontact for cooperating with said contacter, a lost-mo tion connection between said contactor. and said magnetic member and means for retarding said magnetic member.-

8. ln combination, a Winding, a movable magnetic member therefor, a movable contactor, a roller contact for cooperating with said contactor, a lostmotion connection between said contactor and said magnetic member, means for causing said contacter and saidlrolleiecontact to engage and disengage with a snap action any means` for re tarding said magnetic means.

9. In combination, a movable contact, a relatively stationary contact, means whereby a motion of separation of said contacts causes a rolling motion o one of them and a motion of/.engagement vcauses a wiping action between them,` and means for causing a comparatively yslovir motion of said movable contact during thejirst .part 'of .the motion of separat-ion, aj rapid `motion during "the latter part of saidmotiomzand a rapid HERBERT lV. CHENEY. 

